Here are the results from the previous round:
Dazzler (Alison Blaire) vs. Wolverine 11-14
Professor X vs. Kang the Conqueror 17-8
Black Widow (Natasha Romanova) vs. Sif 18-7
Mockingbird (Bobbi Morse) vs. Star-Lord 18-7
Spider-Woman (Jessica Drew) vs. Beta Ray Bill 13-12
The Black Cat vs. Luke Cage 13-12
Moon Knight vs. Emma Frost 15-10
Quicksilver vs. Black Knight (Dane Whitman) 14-11
You vote for the one who you like more, not's who's the strongest one in a fight and have fun:
Black Widow (Natasha Romanova) vs. The Black Cat
Professor X vs. Quicksilver
Mockingbird (Bobbi Morse) vs. Wolverine
Moon Knight vs. Spider-Woman (Jessica Drew)